Mold for making chilled car-wheels and other circular objects.



T. .1). WEST. MOLD FOR MAKING OHILLED GAB. WHEEL$ AND OTHER CIRCULAROBJECTS.

Patented Apr. 13

SHEETS-SHEET 1.

APPLICATION FILED DEO.10, 1908. 918,236.

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11-: NORRIS PETERS ca, wAsHnvm-au, 0.";

T. D. WEST. Y MOLD FOR MAKING GHILLED GAB WHEELS AND OTHER GIRGULAROBJEGTS.

Patented Apr. 13, 1909.

4 SHEETS-SHEET 2.

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T. D. WEST.

MOLD FOR MAKING GHILLED GAR WHEELS'AND OTHER GIBGULAR OBJECTS.

' APPLICATION FILED DEC. 10, 1908.

PatentedA 13,1909.

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pr. 4 S H'EE T S Z32 vnfozt' m wv Ma /w v T. D. WEST. MOLD FORMAKLNGOHILLED GAR WHEELS AND OTHER CIRCULAR OBJECTS.

APPLICATION FILED DEC. 10, 19 08. 918, 236.-

1/? Zforkegqs Patented Apr. 13, 19.09.

4 SHEETS-SHEET 4.

THOMAS D. WEST, OF SHARPSVILLE, PENNSYLVANIA.

MOLD FOR MAKING GHILLED CAB-WHEELS AND OTHER CIRCULAR OBJECTS.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed December 10, 1908. Serial No. 466,840.

molds for casting circular objects, such, for

instance, as chilled car-wheels, and pertains more especially to a moldfor casting a wheel or circular object having a beveled flange at oneend thereof. 1 would here remark that a chilled cast car-wheel whosechill is unequal in thickness is seriously defective because such anunequal thickness of the chill decreases the life of the wheel and maycause wrecks on railways.

The primary object of this invention is to provide a mold of thecharacter indicated whereby the car-wheel or other circular object castin the mold has a peripheral crust or shell which is uniform inthickness circumferentially of the said circular object.

Another object is to cast a car-wheel or other circular object which hasall of its outer circumferentially extending or peripheral surfacesconcentric relative to its axis or center.

Another object is to construct a mold of the character indicated whichis convenient and reliable in its operation and whose component partsare assembled and separated with facility.

With these objects in view, and to the end of realizing other advantageshereinafter appearing, this invention consists in certain features ofconstruction, and combinations of parts, hereinafter described, pointedout in the claims and illustrated in the accompanying drawings.

In the said drawings, Figure 1 is a central vertical section of myimproved mold ready to be poured. Fig. 2 is a horizontal section on line2-2, Fig. 1, looking downwardly. Fig. 3 is a central vertical section ofthe mold showing a car-wheel cast within and by the mold. Fig. 4 is ahorizontal section on line 44, Fig. 1, looking downwardly. Fig. 5 is ahorizontal section on line 55, Fig. 1, looking upwardly. Fig. 6 is avertical sec tion on line 6-6, Fig. 1, looking outwardly. Fig. 7 is avertical section in detail on line 77, Fig. 1, looking inwardly. Fig. 8is a vertical section in detail on line 8-8, Fig. 1,

looking outwardly. Fig. 9 is a vertical sec tion illustrative of themeans employed in centering the casting at the upper end of the casting.Fig. 10 is a vertical section on line 1010, Fig. 9, looking inwardly.Figs. 9 and 10 are drawn on a larger scale than the preceding figures.

My improved mold consists in the main of an upper mold-part or cope, alower moldpart or drag and a central mold-part or chill.

Referring to Figs. 1, 3 and 4 of the drawings, A indicates an annularmetal shell or casing which forms a portion of the lower mold-part ordrag and is concentric relative to the center of the mold. The casing Ais arranged vertically and rests upon a horizontally arranged metalplate which is suitably secured to the said casing and forms the bottomof the drag, which bottom is provided with vent-holes 16 and avertically downwardly projecting annular flange 17 to elevate the bottomabove the floor or sup port upon which the mold is to be mounted. Thedrag is rammed with sand in any approved manner, and the body of packedsand 18 of the drag fills the chamber formed within the casing A andextends over and covers theupper end of the said casing, as at 19, andalso fills a recess 20 which is formed in the upper edge and extendscircumferentially of the said casing, which recess has its side wallsundercut to assist in retaining in place the contents of the said recessand consequently the packed sand-covering of the said casing. The top ofthe sand-body 18 of the drag has the contour required to form the bottomof the casting.

B indicates (see Figs. 1, 2 and 3) an annular metal shell or casingwhich forms a portion of the upper mold-part or cope and is concentricrelative to the center of the mold. The casing B is arranged verticallyand supported as will hereinafter appear. The cope is rammed with sandin any approved manner, and the body of packed sand 28 of the copesubstantially fills the chamber formed within the casing B. The bottomof the sand-body 28 of the cope has the contour required to form the topof the casting. The cope and the drag are spaced vertically. That is,the cope is arranged a suitable dis tance above the drag to form thechambers C between them, which chamber is enlarged diametrically andannularly at its lower end, as at (see Figs. 1 and-4). The centralmold-part or chill is annular and arranged vertically and centeredrelative to the drag and the cope, surrounding the chamber 0 andconsisting of a stationary vertically arranged annular cast-iron body orsection D arranged concentrically relative to the center of the mold,and a vertically or endwise shiftable cast-iron ring or annular sectiond arranged under and concentric relative to the said stationarychill-section. The endwise shift-able or lower chill-section (Zsurrounds and loosely embraces the drag and is normally in its upperposition and capable of being lowered as will hereinafter appear, beinglocked in its upper position by suitably supported movable bars e.

The flange of the car-wheel or flanged circular object to be cast in themold is formed next above the sand-covering 19 of the dragcasing A, andthe upper portion of the shiftable or lower chill-section (1 projectsfar enough above the said sand covering in the upper position of thesaid chill-section to form the periphery of the said flange. The

, said upper portion of the shiftable or lower chill-section d isprovided internally with a downwardly and outwardly sloping or beveledannular surface 32 which, in the upper position of the saidchill-section, forms the surrounding wall of the diametrically enlargedlower end of the chamber C and in casting forms the desired bevel on theperiphery of the flange of the car wheel or flanged circular objectbeing cast. The shiftable or lower chill-section d slidably embraces thecasing A of the drag and is guided during its endwise movement by thesaid casing which is externally circular and concentric relative to thecenter of the mold so that the said chill-section is always centeredaccurately relative to the center of the mold and its beveled or slopingsurface 32 kept concentric relative to the center of the chamber Cduring the descent of the said chill-section. The lower extremity of theinternal beveled surface 32 of the chill-section d is preferablysomewhat larger diametrically I of the said beveled surface and flushwith the object and the opposite or up e-r end of the object is formedby the interna surface of the stationary chill-section D which isarranged concentrically relative to the beveled or sloping surface 32 ofthe shiftable chill-section (Z. Obviously therefore the stationarychill-section D forms the surrounding wall of the chamber C between theshiftable chill-section (1 at the lower or diametrically larger end ofthe said chamber and the upper end of the chamber and is smaller ininternal diameter between the diametrical enlargement 30 of the lowerend of the said chamber and the upper end of the chamber than theshiftable chi section but has the lower end of the bore formed thereinflaring downwardly toward the shiftable chill-sectiond and meeting theupper extremity of the internal beveled surface 32 of the said shiftablechill-section in the upper position of the last-mentioned chill-section.The stationary chill-section is supported from the drag, and preferablythe drag-casing A is provided at its lower end and externally and belowthe range of move? ment of the shiftable chill-section d with laterallyand outwardly projecting lugs a which are spaced circumferentially ofthe drag and provided at their outer ends with upwardly projectingflanges 21 upon which the stationary chill-section D is mounted, and thelatter is centered preferably relative to the drag by means of pins 22which are borne by the last-mentioned chill-section and depend into thesaid flanges. The cope-casing B is enough larger in internal diameterthan the stationary chill-section D to cause the said chill-section tobe covered by the sand-body 28 of the cope around the bore in the saidchill-section. The cope-casing B is provided at its lower end andexternally with a laterally and outwardly projecting annular flange 1)and secured at the said flange, preferably removably by screws 34 to thestationary chillsection D so that the co e is supported from the saidchill-section. Tl esand-body 28 of the cope is provided in its underside and centrally with a circular cavity 35 which is arranged in linevertically and corresponds in dimensions with a circular cavity 25formed in and centrally of the top of the sandbody 18 of the drag. Thesand-body 28 of the cope is provided in its under side and next theinternal surface of the stationary chill-section D with an annularrecess 36 which is ar ranged concentrically relative to the saidchill-section and consequently circumferentially relative to the centerof the chamber C and forms an upward annular enlargement of the saidchamber.

The cope and the drag of the mold illustrated are rammed to moreespecially fit them for casting a car-wheel which has a hub providedwith a central bore extending therethrough, and consequently a bakedsand-core f is arranged vertically and centrally of the chamber C andextends through the said chamber and through the cavities 25 and 35 fromwithin the bottom of the cavity into the to wall of the cavity 35. Toform an annular chamber within and centrally of the casting an annularsand-core 23 which has an internal diameter substantially correspondinwith the diameter of the cavities 25 and is arranged centrally of thechamber C and concentrically relative to the core f and connected, as at24, at a plurality of points with and supported from the sand body 18 ofthe drag, and further supported or held in place if necessary bychaplets not shown. The top wall of the cope-cavity 85 forms the bottomof a circular pouring basin which has the surrounding wall 37 of itschamber built up of sand and inclosed by a metal casing 38 which isconnected with the cope-casing B by webs 39 which are spacedcircumferentially of the said basin and embedded in and instrumental insupporting the sand-body 28 of the cope. The pouring basin is formedcentrally of the sand-boc y 28 of the cope and has its bottom providedwith gates or perforations 40 which establish communication between thesaid basin and the cope-cavity 35. The molten metal employed in pouringthe mold is supplied to the pouring-basin, thence flows through thegates or perforations d0 in the bottom of the said basin and through thecope-cavity 35 into the chamber C and fills every unoccupied portion ofthe said chamber. During the cooling of the molten metal with which themold has been poured the casting formed in the mold contractshorizontally or diametrically and becomes smaller in external diameterduring the cooling process and thereby frees the stationarychill-section D.

To maintain the tread and flange or entire circumferential surface ofthe casting exactly central relative to the mold it is important toafford a lateral bearing to the beveled peripheral surface of the saidflange all around the flange during the cooling and horizontalcontraction of the casting. By the descent of the shiftablechill-section during the horizontal contraction of the casting theinternal beveled surface 32 of the said chill section will remain incontact with and hug the beveled peripheral surface of the flange of thecasting during the said contraction of the casting until the saidchill-section has lowered far enough to free the casting, and the resultis the production of a circumferentially chilled circular object whichhas its chill uniform in thickness cir cumferentially of and throughoutthe object, and has all of its outer circumferentially extending orperipheral surfaces concentric relative to the axis or center of theobject. As already indicated the shiftable chillsection is locked in itsupper position by movable bars 6, but as soon as a crust or shell isformed on the casting after the pouring of the mold the said bars areshifted outwardly from under the said chill-section to render the saidchill-section, so far as the said bars are concerned, free to descend bygravity, and the said chill-section, when rendered free to descend, willof course lower by gravity as fast as the casting contracts horizontallyduring the cooling of the casting. The bars 6 are arranged substantiallyradially and spaced circumferentially of the mold below the shiftablechill-section d. The bars 6 rest upon the lugs a of the drag-casing Aand are shiftable endwise. The bars 0 project under and hold and lockthe shiftable chill-section (Z in its upper position or are removed fromunder the said chill-section). according as the bars are at the one orthe other extremity of their range of movement. The bars e are providednear their inner ends and on top with outwardly facing shoulders 42, asshown in Figs. 1 and 3, and plates G wh ch are attached, preferablyremovably by means of screws 9, to the outer sides of the flanges 21 ofthe lugs a loosely straddle the bars and are arranged to cooperate withthe said shoulders in forming stops for limiting outward movement of thebars and prevent accidental detachment of the bars from the mold, saidshoulders abutting against th inner sides of the said plates in theouter position of the bars, and the flanges 21 are slotted, as at let,to accommodate the location of the bars. In Fig. 3 a bar 0 is shown inits outer and inoperative position and consequently removed from underthe shiftable chill-section (Z and the said chillsection in this figureis shown lowered far enough to free the flange of the casting H shownformed in the mold. It will be observed that the sand-covered dragcasingA is arranged under and concentrically relative to the diametricalenlargement 30 of the lower end of the chamber C and consequently theflange of the casting is adequately supported to withstand any pressureexerted against its beveled peripheral surface by t 1e shiftablechill-section.

Means for preventing detachment of the shiftable chill-section d fromthe dragcasing A when the drag is turned down side up, eitherpreparatory to the assemblage of the parts of the mold or after theseparation of the stationary chillwection D and connected cope and thecasting from the drag, are provided and preferably comprise pins 1 whichextend loosely through the plates G and loosely through the flanges 21 asuitable distance above the bars a into recesses 43 formed in the outerside of the shiftable chill-section d and extending verticallydownwardly from the upper extremity of the said chillsection and havingtheir bottoms forming upwardly facingshoulders 4A which are overlappedby the said pins. It will be observed therefore that the shiftablechill-section is provided at its outer side with upwardly facingshoulders 44 spaced circumferentially of the said chillsection andoverlapped by suitably supported pins I which are preferably withdrawable endwise from over the said shoulders to detach the saidchill-section if desired from the drag, and that the extension of therecesses 43 to the upper extren'iity of the said chill-sectionaccommodates the location of the pins I and avoids interference by thesaid pins with the descent of the said chill-section upon rendering thelatter free to lower.

It is also important to have the upper end of the casting centered andkept centered accurately relative to the center of the mold during thecooling and horizontal contraction of the casting, and the meansemployed for keeping the upper end of the casting thus centered duringthe horizontal contraction of the casting comprises endwise movable barsJ mounted on the stationary chill-section D and placed. substantiallyradially and spaced circumferentially of the chill. Preferably the innerportion of the upper end of the chillsection D is somewhat raised, as at45, (see Figs. 1 and 9) to afford bearing to the inner ends of the barsJ, and the said bars to reduce the friction had between them and thesaid chill-section during the endwise movement of the bars to a minimumare provided between the said raised portion of the said chill-sectionand their outer ends with antifriction rollers K which rest upon thesaid chill-section. The casting-centering bars J loosely engage andextend through recesses 46 formed in the lower end of the cope, and theside walls of the said recesses prevent iilisplacement of the said barslaterally or circumferentially of the chill. The bars J correspond inlength and have their inner ends equidistant from a point centrally ofthe chamber C. The bars J in their outer position, as shown in Figs. 1,9 and 10, have their inner ends arranged flush with the internal surfaceof the chillsection D and are arranged to enter the recess or upwardenlargement 36 of the chamber C and are locked in their outer positionby ring L which is arranged concentrically relative to the chill andpreferably loosely embraces the laterally and outwardly facing innerside wall of an annular recess 47 formed in the upper end and eX-tending circumferentially of the chill-section D and arranged a suitabledistance from and concentrically relative to the chamber 0. The bars Jextend over the bottom of the recess 47. The ring L is shiftablecircumferentially of the chill and provided at its upper end and outerside with laterally and outwardly projecting lugs Z spacedcircumferentially of the ring and in the barlocking or operativeposition of the said ring overlapping or engaging inwardly facingshoulders 48 formed on the outer ends ofthe bars J at the bottoms of thesaid bars. Obviously to render the bar-locking means formed by the ringL and its lugs Z inoperative all that is required is to shift the saidring circumferentially of the chill far enough to free the shoulders 48of the bars J from the lugs Z of the said. ring whereupon the bars arefree to move inwardly. It will be observed that the body of the ring Lat its outer side and between its lugs Z is arranged to be engaged inthe operative position of the ring by the shoulders 48 of the bars Jwhen the latter are at the inner extremity of their range of movementand consequently limits the inner movements of the said bars. The bodyof the ring projects upwardly, as at Z, Fig. 9, above the lowerextremities of the rollers K of the castingcentering bars J so thatthesaid upward y projecting portion of the said ring c0op erates withthe rollers K of the said bars in forming stops for limiting the outwardmovement of the said bars.

N ot unimportant is the actuation of the bars J inwardly simultaneouslyand equally and the maintenance of the bars at their inner ends incontact with. the casting during the horizontal contraction of thecasting so as to keep the casting at its upper end accurately centeredrelative to the center of the mold during the said contraction of thecasting. The means for simultaneously actuating the bars J inwardly,when the said bars are unlocked from the bar-locking means, preferablycomprise a vertically shiftable ring R which surrounds the cope and isarranged vertically and exactly centrally relative to the mold. The ring'R is therefore arranged concentrically relative to the chamber C andforms an annular weight which at its lower end overlaps the outer endsof the bars J, and the outer side wall of the recess 47 in the chill-eection D is, as already indicated, concentrlc relative to the chamber Cand surrounds and affords lateral bearings to and guides the ring orweight It and maintains the latter in position centrally relative to thecenter of the mold. The said wall is preferably formed by an annularflange 49 which is formed on and projects upwardly from and is arrangedconcentrically relative to the chill-section D. The lower portion of thebore in the ring or weight R flares downwardly toward the lower end ofthe ring or 2 weight to form an annular downwardly and outwardly sloping0r beveled surface 7 internally of the'lower end of the said rin orweight, which surface has the proper s ope relative to thebeveledsurface of the shiftable chill-section (Z, and the outer ends ofthe bars J preferably have suitably beveled surfaces 50 which areoverlapped by the aforesaid internal beveled surface 1" of the ring orweight R. It will be observed therefore that the ring or wei ht R issupported from the bars J and is he d in its upper position while thesaid bars are locked in their outer position, and that the said ringor-weight and the said bars have mutually engaging opposing surfaceswhich have such relative trend that th bars when unlocked are actuatedinwardly during the descent of the said rin or weight. The ring or weiht R is preferab y not only guided external y by the flange 49 of thechill but also guided internally by the cope whose casing B is providedexternally with several lugs B which are spaced circumferentially of thecasing, and plates Z) are attached, preferably removably by suitablyapplied bolts b and nuts 3J to the lugs B, which plates projectlaterally and outwardly into such close proximity to the internalsurface of the ring or weight R above the internal beveled surface r ofthe said ring or weight so as to accurately center the said ring orweight relative to the cope and consequently relative to the center ofthe mold.

The ring or weight R is provided at its uper end and externally withlaterally and outwardly projecting lugs 52 spaced circumferentially ofthe said ring or weight, and the shiftable chill-section d is providedat its upper end and externally with laterally and outwardly projectinglugs 53 spaced circumferentially of the said chill-section and arrangedin line vertically with the lugs 52 of the bar-actuating ring or weightii, and clamps having u per jaws 54 engaging the top surfaces of thelugs 52 and lower paws 55 engaging the under surfaces of the ugs 53establish operative connection between the said chill-section and thering or weight it and causethe latter and the said chill-section to movein unison. It will be observed that the shiftable chill-section d issupported from the ring or weight B after the bars e employed in holdingand locking the said chill-section in its upper position independentlyof the op erative connection of the said chill-section with the ring orweight R are removed from under the said chill-section to permit thelatter to lower with the ring or weight it when the casting-centeringbars J are unlocked and permitted to move inwardly.

To afford convenient access to the barloclring ring L for shifting thesaid ring cir cumi'erentially to actuate it from the one to the other ofits posi ions the flange 49 of the chill-section D (see l ig. 5) isprovided with apertures 56 spaced oircumferentially of the chill, andthe said ring to facilitate the said shifting of it is provided in itsouter side and adjacent the said aperture with cavities 57. Hence bysuitably nzai'iipulating any bar or similar tool passed into engagementwith a cavity 57 in the ring L through one of the apertures 56 in theflange 49 the said ring is readily shiftable in the one or the other diii i l rection according as the ring is to be actuated. fro. n itsoperative into its inoperative position or vice versa.

1 would remark that although it is desirable in all'cases to employ thecasting-centering bars J as well as the internal beveled surface 32 ofthe shiftable chill-section in centering the casting during thehorizontal contraction of the casting I do not wish to be understood aslimiting myself to the use of the said bars, as in some cases the saidbars might be omitted and the aforesaid beveled surface of the shittable chill-sectional one used in centering the casting.

l l hat 1 claim is l. A mold of the character indicated comprising asuitably rammed lower mold-part or drag; a suitably rammed and suitablysupported upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber, and a chillsurrounding the chamber and comprising an annular endwise shiftablesection provided internally with a circumferentially extending slopingsurface which in the normal position of the said chill-section forms thesurrounding wall of a portion of the chamber at one end of the chamber,said chill also comprising a suitably supported annular section formingthe surrounding wall of the chamber between the opposite end of thechamber and the firstmentioned chill-section, and the latter when freeto be shifted being capable of movement to keep it a suitable length oftime in contact at its aforesaid sloping surface with the casting duringthe horizontal contraction of the casting formed in and by the mold.

2. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber, and a chillsurrounding the chamber and comprising an annular endwise shiftablesection provided intern ally with an annular beveled surface which inthe normal position of the said chill-section forms the surrounding wallof a portion of the chamber at one end of the chamber, said chill alsocomprising a relatively stationary annular section forming thesurrounding wall of the chamber between the opposite end of the chamberand the shiftabfe chill-section.

3. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber and isdiametrically enlarged at one end, and a chill surrounding the chamherand comprising an annular endwise shiftable section which in its normalposition surrounds. the aforesaid diainetrical enlargement of thechamber and is provided internally with a circumferentially extendingsloping surface forming the surrounding wall of a portion of the chamberat the diametrically enlarged end of the chamber, said chill alsocomprising a suitably supported annular section forming the surroundingit all of the chamber between the opposite end of the chamber and thefirst-mentioned chillsection.

4. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber be tween the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber and isdiametrically enlarged at one end, and a chill surrounding the chamberand comprising an annular endwise shiftable section which in its normalposition surrounds the aforesaid diametrical enlargement of the chamberand is provided internally with an annular beveled surface forming thesurrounding wall of a portion of the chamber at the diametricallyenlarged end of the chamber, said chill also comprising a relativelystationary annular section forming the surrounding wall of the chamberbetween the opposite end of the chamber and the shiftable chill-sectionand being smaller than the shiftable chill-section in internal diameterbetween the diametrically enlarged end and other end of the chamber, andthe shiftable chill-section when free to be shifted being capable ofmovement to keep it a suitable length of time in contact at itsaforesaid beveled surface with the casting during the horizontalcontraction of the casting formed in and by the mold.

5. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable dis-- tance abovethe drag to form a chamber be tween the drag and the cope, which chamberhas an inlet for the passage of molten metal to the chamber and isdiametrically enlarged at one end, and a chill surrounding the chamberand comprising an annular endwise shiftable section which in its normalposition surrounds the aforesaid diametrical enlargement of the chamberand is provided internally with an annular beveled surface forming thesurrounding wall of a portion of the chamber at the diametricallyenlarged end of the chamber, siad chill also comprising a relativelystationary annular section forming the surrounding wall of the chamberbe-. tween the op osite end of the chamber and the shiftable chil-section and being smaller than the shiftable chill-section in internaldiameter between the diametrically enlarged end and the other end of thechamber but having the bore formed therein flaring toward the saidshiftable chill-section.

6. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber be tween the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber, and a chillsurrounding the chamber and comprising an annular endwise shiftablesection provided internally with a circumferentially extending slopingsurface which in the normal position of the said chill-section forms thesurrounding wall of a portion of the chamberat one end of the chamber,said chill also comprising an annular section which forms thesurrounding wall of the chamber between the opposite end of the chamberand the first-mentioned chillsection and supports the cope and issupported from the drag.

7. A mold of the character indicated comprising a lower mold-part ordrag an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber, and chillsurrounding the chamber and comprising an annular endwise shiftablesection provided internally with an annular beveled surface which in thenormal position of the said chill-section forms the surrounding wall ofa portion of the chamber at one end of the chamber, said chill alsocomprising a suitably supported annular section arranged concentricrelative to the aforesaid beveled surface and forming the surroundingwall of the chamber between the opposite end of the chamber and thefirstmentioned chill-section.

8. A mold of the character indicated cornprising a lower mold-part ordrag; an upper iold-part or cope arranged a suitable distance above thedrag to form a chamber be tween the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular endwise shiftablesection provided internally of one end thereof with a circuml'erentiallyextending sloping surface which is arranged concentrically relative tothe center of the mold and slopes laterally and outwardly toward theother end of the said chill-section and in the normal position of thesaid chillsection forms the surrounding wall of a portion of the chamberat one end of the chamber, said chill also con'aprising a relativelystationary annular section forming the .surrounding wall of the chamberbetween the op )OSliG end of the chamber and the shiftable chill sectionand being arranged concentrically relative to the aforesaid slopingsurface, and means whereby the shiftable chill-section is guided duringits endwise opposite end of the ch n'iovement to maintain the saidsloping suriace concentric relative to the center of the mold.

9. A mold of the character indicated comprising a lower mold-part ordrag; an up moli'l-part or cope arrang a suitable lllS- tance above thedrag to loan a chair tween the drag and the cope, whi h i v has an inletfor the passage of olten metal to the chamber; a chill surrounding thechamber and comprising an annular endu'ise shi'ltable section provii" idinternally t circumierentially extending sloping suri'acwhich in thenormal position of this said chill-section forms the surrmjnding wall ofportion of the chamber at one end of the chamber, said chill alsocomprising relatively stationary annular section forming the surroundingwall of the chamber beta een the her and the shiftable chill-section,and means for locking or holding the shifts-l le chill-section in itsnormal position said loclring means adapted to be rendered iuimerativeto perinit the last-mentioned chiihsection to be kept a suitable lengthof time in contact at al'oresaid sloping surface with the casting duringthe horizontal contraction of the casting formed in and by the mold.

10. ll mold of the character indicated comprising a lower niold art ordrag; an upper moldpart or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formi gthe surrounding wall of the chamber; suitably supported mov able barsspaced circuinlercntially oi the chill, said bars being nor" .-yarranged to enter the chamber, and means whereby the said bars aresimultaneously actuated inwardly and kept in contact with the castingduring the horizontal contraction of the castin g formed in and by themold.

11. A 1? old 01' the character i"=-dicate(l comprising a lower mold-partor drag; an upper mold-part or cope arranged a suitable distance abovethe drag to "form chamber between the drag and the cope, nhich chamberhas an inlet for the passage of molten metal to the chamber; an annularchill forming the surrounding wall of the chamber; suitably supportedendwise movable bars placed sult stantially radially and spacedcircumferentially oi the chill, said bars being normally in their outerposition and arranged to enter the chamber and having their inner endsequidistant from a point centrally oi the chamber, and means whereby thesaid bars are actuated inwardly in unison and kept a suitable length oitime in contact at their inner ends with the casting during thehorizontal contraction of the casting formed in and by the mold.

12. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; an annularchill forming the surrounding wall of the chamber; suitably supportedendwise movable bars placed substantially radially and spacedcircumferentially of the chill, and corresponding in length, said barsbeing normally in their outer position and arranged to enter the chamberand having their inner ends equidistant from a point centrally of thechamher, and means whereby the said bars are actuated inwardly in unisonand kept in contact at their inner ends with the casting during thehorizontal contraction of the casting formed in and by the mold.

13. A mold of the character indicated comprising a lower moldpart ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe sur rounding wall of the chamber; suitably supported movable barsspaced circumferentially of the chill and being normally in position tomove into the chamber; means whereby the bars are locked in their outerand normal position, said bar-locking means being shiftable to free thebars and thereby permit inward movement of the bars, and

ieans whereby the bars when unlocked are movable inwardlysimultaneously.

1%. A mold of the character indicated com prising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form chamber between the drag and the cope, which chamber has aninlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; movable bars supported from andspaced circumferentially of the chill and being normally in position tomove into the chamber, and means whereby the bars are locked in theirouter position, said bar-locking means being supported from the chilland shiftable to free the bars and thereby permit inward movement of thebars.

15. i mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable dis tance above thedrag to form chamber between the drag and the cope, which chamber has aninlet for the passage of molten metal to the chamber; an annular chillforming the surrounding wall of the chamber; suitably supported endwisemovable bars placed substantially radially and spaced circumferentiallyof the chill and normally in their outer position and in the saidposition being arranged to move into the chamber, said bars l (ll) beingprovided at their outer ends with inwardlyfacing shoulders; a suitablysupport ed bar-locking member extending and shiftable circumferentiallyof and arranged concentrically relative to the chill and provided withlugs which in the operative position of the bar-locking member overlapthe afore said shoulders in the outer position of the bars and lock thebars in the said position but free the bars to permit the latter to moveinwardly upon shifting the bar-locking member circumferentially torender its lugs inoperatlve.

16. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope which chamber hasan inlet for the passage of molten metal to the chamber; an annularchill forming the surrounding wall of the chamber; movable bars spacedcircumferentially of and supported from the chill and being normally inposition to move into the chamber, said bars being provided a suitabledistance from their inner ends with inwardly facing shoulders, and abar-locking member extending and shiftable circuniferentially of andarranged concentrically relative to and supported from the chill, saidbar-locking member being provided with lugs which in the operativeposition of the said bar-locking member overlap the aforesaid shouldersin the outer position of the bars and lock the bars in the said positionbut free the bars to per- 7 mit the latter to move inwardly uponshifting the bar-loclring member circumferentially to render its lugsinoperative.

17. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; an annularchill forming the surrounding wall 01 the chamber and provided suitabledistance from the chamber with a recess which extendscircum'l'erentially of the chill and is arranged concentrically relativeto the chamber; suitably supported movable bars spacedcircuml'erentially of the chill and being normally in position to moveinto the chamber and extending over the bottom of the said recess andprovided in suitable proximity to their outer extremities with inwardlyfacing shoulders, and a bar-locl ing member arranged within the saidrecess and being shiftable cii'ciilmei'entially oi the chill, saidbarlocking member being provided with lugs which in its operativeposition overlap the aforesaid shoulders in the outer position of thebars and lock the bars in the said position but free the bars to permitthe latter to move inwardly upon shifting the bar-locking membercircumierentially to render its lugs inop-' erative.

18. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to l'orm a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; an annularchill forming the surrounding wall oi the chamber and provided asuitable distance from the chamber with an annular recess which isarranged concentrically relative to the chamber; movable bars spacedcircumferentially of the chill and being normally in position to moveinto the chamber and extending over the bottom of the said recess andprovided a suitable distance from the outwardly facing side wall of therecess with inwardly "facing shoulders, and a bar-locking memberextending circumferentially of and having lateral bearing against thesaid wall of the recess, said bar-looking member being shiftablecircumferentially of the chill and being provided with lugs which in itsoperative position overlap the aforesaid shoulders in the outer positionof the bars and lock the bars in the said position but free the bars topermit the latter to move inwardly upon shifting the bar-locking membercircumferentially to render its lugs inoperative.

197 A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; an annularchill forming the surrounding wall 01' the chamber and provided in itsupper end and a suitable distance from the chamber with a recess whichextends circumferentially of the chill and is arranged concentricallyrelative to the chamber; movable bars mounted on and spacedcircumlerentially ol' the chill and being normally in position to moveinto the chamber and extending over the bottom of the said recess andprovided at their outer ends and at the bottom with inwardly facingshoulders; a bar-locking member arranged within the said recess andextending and being shift- 7 able circumferentially of the chill, saidbarlocking member being provided with lugs which in its operativeposition overlap the aforesaid shoulders-in the outer position of thebars and lock the bars in the said position but free the bars to permitthe latter to move inwardly upon shifting the bar-locking membercircumferentially to render its lugs inoperative.

20. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber and provided a suitable distancefrom the chamber with an annular recess which is arranged concentricrelative to the chamber; endwise movable bars supported from and placedsubstantially radially and spaced circumferentially of the chill andnormally in their outer position and in the said position being arrangedto move into the aforesaid chamber, said bars being provided at theirouter ends and at the bottom with inwardly facing shoulders; a suitablysupported bar-locking ring loosely embracing the laterally and outwardlyfacing side wall of the recess, said ring being shiftablecircumferentially of the chill and provided at its outer side with lugswhich in the operative position of the ring overlap the aforesaidshoulders in the outer position of the bars and lock the bars in thesaid position but free the bars to permit the latter to move inwardlyupon shifting the ring circumferentially to render its lugs inoperative.I

21. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported and suitablyoperated endwise movable bars placed radially and spacedcircumferentially of the chill and normally in their outer position andin the said position being arranged to move into the aforesaid chamber;means for preventing lateral displacement of the bars, and means forlimiting inward movement of the bars.

22. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported and suitablyactuated endwise movable bars placed radially and spacedcircumferentially of the chill and normally in their outer position andin the said position being arranged to move into the chamber, and meansfor limiting endwise movement of the bars.

23. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope; which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported endwise movablebars placed ra- X dially and spaced circumferentially of the chill andnormally in their outer position and l in the said position beingarranged to move 1 into the chamber; means for preventing lateraldisplacement of the bars, and means for simultaneously exerting pressureinwardly against the outer ends of the bars and thereby actuating thebars inwardly in unison.

24. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber, said cope beingprovided inits lower end and externally of the chamber with recesseswhich are arranged substantially radially of and spacedcircumferentially of the cope; a chill forming the surrounding wall ofthe chamber, andsuitably supported and suitably actuated endwise movablebars engaging and extending through the aforesaid recesses and normallyin their outer position and in the said position being arranged to moveinto the chamber.

25. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged. a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber, and suitably actuated endwisemovable bars placed radially and spaced circumferentially of the chilland normally in their outer position and in the said position beingarranged to move into the aforesaid chamber, said bars having bearing attheir inner ends upon the chill and being provided a suitable distancefrom the said ends with antifriction rollers resting on the chill.

26. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form chamber between the drag and the cope; which chamber has aninlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported bars spacedcircumferentially of the chill and movable into and out of the chamberand normally in their outer position and in the said position beingarranged to move into the chamber; means whereby the said bars arelooked in their outer-position, said bar-locking means being adapted tobe rendered inoperative, and a suitably supported ring providedinternally with a sloping annular surface operatively engaging the barssaid ring when the bars are unlocked being free to move endwise andthereby cause its inwar dly aforesaid sloping surface to actuate thebars 27. A mold of the character indicated comprising a lower mold-partor drag; an upper mold-part or cope arranged a suitable distance abovethe drag to form a chamber between the drag and the cope, which chamberhas an inlet for the passage of molten metal to the chamber; a chillforming the surrounding wall of the chamber; suitably supported barsspaced circumferentially of the chill and equidistantly from the centerof the chamber, said bars being movable into and out of the chamber andnormally in their outer position and in the said position being arrangedto move in the chamber; means whereby the said bars are locked in theirouter position, said bar-locking means being adapted to be renderedinoperative; a suitably supported ring operatively eng aging the barsand being free, when the bars are unlocked, to move endwise, and meanswhereby the said ring is guided and maintained concentric relative tothe mold during the endwise movement of the ring, and the ring and thebars having mutually engaging surfaces which have such relative trendthat the bars are moved inwardly during the endwise movement of the ringin the required direction.

28. A mold of the character indicated. comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope; which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported endwise movablebars placed substantially radially and spaced circumferenti-a-lly of thechill and normally in their outer position and in the said positionbeing arrarged to move into the chamber; means whereby the said bars arelocked in their outer position, said bar-locking means being adapted tobe rendered inoperative; a suitably supported ring overlapping the outerends (if the bars and being provided internally with a sloping annularsurface engaging the said ends of the bars, said ring when the bars areunlocked being free to move endwise and thereby cause its aforesaidsloping surface to actuate the bars inwardly, and a lateral bearing forthe said ring.

29. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported endwise movablebars placed radially and spaced circumferentially of the chill andnormally in their outerposition and iii the said position being arrangedto move into the chamber; means whereby the bars are locked in theirouter position, said bar locking means being adapted to be renderedinoperative, and a ring overlapping the outer ends of the bars andsupported by the bars when the bars are locked in their outer posi tion,said ring being free to lower when the bars are unlocked and providedinternally with a downwardly and outwardly sloping annular surfaceengaging the said ends of the bars and arranged to actuate the barsinwardly during the descent of the ring.

30. A mold of the character indicated comprising a lower mold-part ordrag; ,an upper mold-part or cope arranged a suitable distance above thedrag to form chamber between the drag and the cope, which chamber has aninlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported endwise movablebars placed substantially radially and spaced circumferentially of thechill and normally in their outer position and in the said positionbeing arranged to move into the chamber; means whereby the bars arelocked in their outer position, said barlocking means being adapted tobe rendered inoperative, and a ring overlapping the outer ends of thebars and supported by the bars when the bars are locked in their outerposition, said ring being concentric relative to the chamber and free tolower when the bars are unlocked and provided internally with adownwardly and outwardly slopir g annular surface engaging the said endsof the bars and arranged to actuate the bars inwardly during the descentof the ring, and means for guiding the ring to maintain the ringconcentric relative to the chamber durir g the movement of the ring.

31. A mold of the character indicated comprising lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, whichchamber hasan inlet for the passage of molten metal to the chamber; a chillformingthe surrounding wall of the chamber; suitably supported barsmovable into and out of the chamber and normally in their outer positionand in the said position being arranged to move into the chamber; meanswhereby the bars are locked in their outer position, said bar-lockingmeans being adapted to be rendered inoperative, and a ring overlappingthe outer ends of the bars and supported by the bars when the bars arelocked in their outer position, said ring being concentric relative tothe chamber and free to lower when the bars are unlocked and providedinternally with a downwardly and outwardly sloping annular surfaceoperatively engaging the said ends of the bars and arrarged to actuatethe bars inwardly during the descent of the ring, and means for guidingthe ring to maintain the ring concentric relative to the chamber duringthe movement of the ring, said ring-guiding means being borne by thecope.

32. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, whi h chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe. -'all of the chamber; suitably surrounding supported endwisemovable bars placed sub stantially radially of and spacedcircumferentially oil' the chill and normally in their outer positionand in the said position being arranged to move into the chamber; meanswhereby the bars are locked in their outer position, said bar-lockingmeans being adapted to be rendered inoperative, and a ring overlappingthe outer ends of the bars and supported by the bars when the bars arelocked in their outer position, said ring being concentric relative tothe chamber and free to lower when the bars are unlocked and providedinternally with a downwardly and outwardly sloping annular surfaceengaging the said ends of the bars and arranged to actuate the barsinwardly during the descent of the ring, and laterally and outwardlyprojecting members borne by and spaced circumferentially oi the cope andarranged to guide the ring and maintain the ring concentric relative tothe mold during the movement of the ring.

33. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported bars movableinto and out of the chamber and normally in their outer position and inthe said position being arranged to move into the chamber; means wherebythe bars are locked in their outer position, said bar-locking meansbeing adapted to be rendered inoperative, and a weight operativelyconnected with the bars and being free when the bars are unlocked tolower and to actuate the bars inwardly.

34. A mold of the character indicated compris'mg a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chill formingthe surrounding wall of the chamber; suitably supported endwise movablebars placed substantially radially and spaced circumferentially of thechill and normally in their outer position and in the said positionbeing ar ranged to move into the chamber, means whereby the bars arelocked in their outer position, said bar-locking means being adapted tobe rendered inoperative, and an annular weight overlapping the outer endof the bars and supported by the bars when the bars are locked in theirouter position, said weight being free to lower when the bars areunlocked and provided internally with a downwardly and outwardly slopingannular surface engaging the said ends of the bars and arranged toactuate the bars in- 'ardly during the descent of the weight.

A mold of the character indicated comprising a lower mold-part or drag;an upper mold-part or cope arranged a suitable distance above the dragto form chamber between the drag and the cope, which chamber has aninlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular endwise shi'itablesection which is provided in tern-ally with a circumieentially extendingsloping surface which in the normal position of the said chill-sectionforms the surrounding wall of a portion of the chamber at one end of thechamber, said chill also comprising a relatively stationary annularsection forming the surrounding wall of the chamber between the oppositeend of the chamber and the shiftable chill-section; means whereby thecasting formed in and by the mold is during its contraction centeredrelative to the last-mentioned end of and relative to the chamber, andmeans for locking the shiftable chill-section in its normal position,said locking means being adapted to be rendered inoperative to permitthe shiftable chill-section to move endwise and maintain its aforesaidsloping surface in contact with the casting during the horizontalcontraction of the casting formed in and by the mold.

36. A mold or the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet "for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiitablelower section which has an internal downwardly and outwardly slopingsurface which in the upper position of the said chill-section forms thelower end of the surrounding wall or the chamber, said chill alsocomprising a suitably supported annular upper section which forms thesurrounding wall of the chamber between the lower chillsection and thecope, and means for locking the lower chil -section in its upperposition, said locking means being adapted to be rendered inoperative topermit the last-mentioned chill-section to lower.

37. A mold of the character indicated. com* prising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber bemetrical enlargement of the chamber and has aninternal downwardly and outwardly sloping surface which in the saidposition of the said chill-section forms the lower end or" thesurrounding wall of the chamber, said chill also comprising a suitablysupported annular upper section which forms the surrounding wall of thechamber between the lower chillsection and the cope and is smaller thanthe last-mentioned chill-section in internal (lie "1 eter between itsupper end and the diametrically enlarged lower end of the chamber, andmeans for locking the lower chill-section in its upper position, saidlocking means being adapted to be rendered inoperative to permit thelast-mentioned chill-section to lower.

38. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form chamber between the drag and the cope, which chamber has aninlet for the passage of molten metal to the chamber; a chillsurrounding the said chamber and comprising an annular endwiseshil'table lower section which has an internal downwar lly and outwardlysloping surface which in the upper position of the said chillsectionforms the lower end of the surround ing wall of the chamber, said chillalso comprising a suitably supported annular upper section which formsthe surroundhig wall of the chamber between the lower chill-section andthe cope, and suitably supported means for locking the lower chill-section in its upper position, said locking means being adapted to berendered inoperative to permit the last-mentioned chill-section tolower.

39. A mold of the character indicated comprising a lower 1uold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which char ber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the said chamber and comprising an annular vertically sniitable lower section which has an internal downwardly and outwardlysloping surface which in the upper position of the said chill-sectionforms the lower end oi the surrounding wall oi the chamber, said chillalso comprising an upper annular section which su ports the cope andforms the surrounding wall of the chaniaer between the lowerchill-section and the cope and is supported ironthe drag, and means forlocking the lower chill-section in its upper position, said lockingmeans being supported from the drag and adapted to be renderedinoperative to permit the last-mentioned chill-section to lower.

e0. A mold of 1; is character indicated com.- prising a lower mold-partor drag; an upper mold-part or cope arranged a suitable distance abovethe drag to form a chamber between the drag and the cope, which chain erhas an inlet for the passage of nolten metal to the chamber and isdiametrically enlarged at its lower end; a chill surrounding the chamberand comprising an annular vertically shil'table lower section which inits upper position surrounds the aforesaid diametrical enlargement ofthe chamber and has an internal downwardly and outwardly sloping surfacewhich forms the lower end of the surrounding wall of and is arrangedconcentrically relative to the chamber, said chill also comprising asuitably supported upper annular section which forms the surroundingwall of the chamber between the lower chillsection and the cope and issmaller than the lower chill-section in internal diameter between itsupper end and the dian-ietrically enlarged lower 7 end of the chamber,and means for locking the lower chill-section in its upper position,said locking means being adapted to be rendered inoperative to permitthe last-mentioned chill-section to lower.

41. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which is provided at its outer side with upwardly facingshoulders spaced circumferentially of the said chill-section and has aninternal downwardly and outwardly sloping surface.

which in the upper position of the said chillsection forms the lower endof the surround ing wall of the chamber, said chill also comprising asuitably supported annular upper section which forms the surroundingwall of the chamber between the lower chill-section and the cope; pinsoverlapping the aforesaid shoulders and supported from the drag, andmeans for locking the lower chillsec tion in its upper position, saidlocking means being adapted to be rendered inoperative to permit thelast-mentioned chill-section to lower.

42. A mold of the character indicated comprising a lower mold-part ordrag; an upper 1nold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which is provided are at its outer side with recessesspaced cir- 1 provided externally with recesses extending cumferentiallyof the said chill-section and extending from the upper extremity of thesaid chill section vertically downwardly and having upwardly facingshoulders formed by the bottoms of the recesses, said chill-seeoutwardly sloping surface which in the upper position of the saidchill-section forms the lower end of the surrounding wall of thechamber, said chill also comprising a suit ably supported annular uppersection which forms the surrounding wall of the chamber between thelower chill-section and the cope; pins supported from the drag andoverlapping the aforesaid shoulders, and means for locking the lowerchill-section in its upper position, said locking means being adapted tobe rendered inoperative to permit the lastmentioned chill-section tolower.

48. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitabledisf tance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which is provided in its outer side with recesses spacedcircumferentially of the said chill-section and extending from the upperextremity of the said chill-section vertically downwardly and havingbottoms forming upwardly facing shoulders, said chill-section having aninternal downwardly and out wardly slop'mg surface which the upperposition of the said chill-section forms the lower end of thesurrounding wall of the chamber, said chill also comprising a suitablysupported annular upper section which forms the surrounding wall of thechamber between the lower chill-section and the cope; pins supportedfrom the drag and overlapping the aforesaid shoulders, which pins arewithdrawable endwise from said shoulders, and means for locking thelower chill-section in its upper position, said locking means beingadapted to be rendered inoperative to permit the last-mentionedchill-section to lower.

A mold of the character indicated comprising a lower mold-part or dragprovided a suitable distance below its upper end and externally withlaterally and outwardly projecting lugs spaced circumferentially of thelrag, which lugs are provided at their outer ends with upwardlyprojecting flanges; an upper mold-part or cope arranged a suitabledistance above the drag to form a chamber between the drag and the cope,which chamber has an inlet for the passage of molten metal to thechamber; a chill surrounding the chamber and comprising an annularvertically shiftable lower section which is from the upper extremity ofthe ring vertically douuiwardly and having bottoms forming upw rdlyfacing shoulders, which chillsection has an internal downwardly andoutwardly sloping surface which in the upper tlon having an internaldownwardly and position of the said chill-section forms the lower end ofthe surrounding wall of the chamber, said chill also comprising asuitably supported annular upper section which forms the surroundingwall of the chamber between the lower chill-section and the cope; pinsextending loosely through and having bearing in the aforesaid flangesand overlapping the aforesaid shoulders, and means for locking the lowerchill-section in its upper position, said locking means being adapted tobe rendered inoperative to permit the lastmentioned chill-section tolower.

45. A mold of the character indicated comprising a lower mold-part ordrag provided a suitable distance below its upper end and externallywith laterally and outwardly projecting lugs spaced circumferentially ofthe drag, which lugs are provided at their outer ends with upwardlyprojecting flanges; an upper mold-part or cope arranged a suitabledistance above the drag to form a chamber between the drag and the cope,which chamber has an inlet for the passage of molten metal to thechamber; a chill surrounding the chamber and comprising an annularvertically shiftable lower section which has an internal downwardly andoutwardly sloping surface which in the upper position of the saidchill-section forms the lower end of the surrounding wall of thechamber, said chill also comprising a suitably supported annular uppersection which sup ports the cope and is attached to the afore saidflanges and forms the surrounding wall of the chamber between the lowerchill-sec tion and the cope, and means for locking the said lowerchill-section in its upper position, said locking means being adapted tobe rendered inoperative to permit the last mem tioned chill-section tolower.

4-6. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which has an internal downwardly and outwardly slopingsurface which in the upper position of the said chill-section forms thelower end of the surrounding wall of the chamber, said chill alsocomprising a suitably supported annular upper section which forms thesurrounding wall of the chamber between the lower chill-section and thecope, and suitably supported movable bars spaced circumferntially o themo a d bars x endi g under the lo or chill-section and locking thelatter its upper position, or being removed from under thelast-mentioned chill-section, according as the bars are at the one orthe other extremity of their range of movement.

{17. A mold of the character indicated comprising a lower mold-part ordrag; an upper moldepart or cope arranged a sultable distance above thedrag to form a chamber between the drag and t 1e cope, which cham berhas an inlet for the passage of molten metal to the chamber; a chillsurrounding the said chamber and comprising an annular verticallyshiitable low er section which in its upper position surrounds thechamber and has an internal downwardly and outwardly sloping surfacewhich in the said position of the said chill-section forms the lower endof the surrounding wall of the chamber, said chill also comprising asuitably supported annular upper section which forms the surroundingwall of the chamber between the lower chill-section and the cope, andiovable bars spaced circumierentially o1 the mold and supported from thedrag, said bars extending under the lower chill-section and locking thelatter in its upper position, or removed from under the last-mentionedchillsection, according as the bars are at the one or the otherextremity of their range of movement.

(i8, A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the said chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which in its upper position surrounds the chamber and hasan internal downwardly and outwardly sloping surface which in the saidposition of the said chill-section forms the lower end of thesurrounding wall of the chamber, said chili also comprising a suitablysupported annular up- Pfil Section which forms the surrounding wall ofthe chamber between the lower chill-section and the cope, and end a. isemovable bars arranged substantially radially and spacedcircumferentially of the mold, said bars extend- 1g under the lowerchill-section and locking the latter in its upper position, or removedfrom under the last-mentioned chill-section, according as the bars areat the one or the other extremity of their range of movement.

l9. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable disabove the dragto form a chamber between the drag and the cop e, which chamber hasinlet for the passage of molten metal tethe chamber; a chill surroundingthe chamher and compr ng n nnul r v rti lly sliiftable lower sectionwhich in its upper po,

sition surrounds the chamber and has ins ternal downwardly and outwardlysloping surface which in thesaid position of the Said chill-sectionforms the lower end of the sur' rounding wall of the chamber, said chillalso comprising a suitably supported annular upper section which formsthe surrounding wall of the chamber between the lower chill-sec tion andthe cope; endwise movable bars arranged substantially radially andspaced circumferentially of the mold and supported from the drag, saidbars extending under and locking the lower chill-section in its upperposition, or removed from under the last.- .mentioned chill-section,according as the bars are at the one or the other extremity of theirrange of movement, and means limiting outward movement of the bars andsupported from the drag 50. A mold of the character indicated comprisinga lower mold-part or drag; an upper mold-part or cope arranged asuitable distance above the drag to form a chamber between the drag andthe cope, which chamber has an inlet for the passage of molten metal tothe chamber; a chill surrounding the chamber and. comprising an annularvertically shiftable lower section which in its upper position surroundsthe chamber and has an internal downwardly and outwardly sloping surfacewhich in the said position of the said chill-section forms the lower endof the surrounding wall oi the chamber, said chill also comprising asuitably supported annular upper section which forms the surroundingwall of the chamber between the lower chillsection and the cope; endwisemovable bars spaced circumferentially of the mold and extending underthe lower chill-section and thereby locking the latter in its upperposition, or removed from under the lastementioned chill-section,according as the bars are at the one or the other extremity of theirrange of movement, said bars being provided with outwardly facingshoulders, and plates supported from the drag and arranged to cooperatewith the said shoulders in forming stops for limiting outward movementof the bars.

51. A mold of the character indicated comprising a lower moldpart ordrag provided a suitable distance below its upper end and externallywith laterally and outwardly projecting lugs spaced circumferentially ofthe drag, which lugs are provided at their outer ends with upwardlyprojecting flanges an upper moldspart or cope arranged a suitabledistance above the drag to form a chamber between the drag and the cope,which chamber has an inlet for the passage of molten metal to thechamber; a chill surrounding the chamber and comprising an annularvertically shil'table lower section which in its upper position surr ndse chamber has an internal downwardly and outwardly sloping surface whichin the said position of the said chill-section forms the lower end ofthe surrounding wall of the chamber, said chill also comprising anannular upper section which is supported from the aforesaid flanges andforms the surrounding wall of the chamber between the lowerchill-section and the cope; endwise movable bars arranged substantiallyradially and spaced circumferentially of the mold and resting on andextending loosely through and beyond the outer sides of the aforesaidflanges, said bars rojecting under the lower chill-section and cokingthe latter in its upper position or removed from under thelast-mentioned chillsection according as the bars are at the one or theother extremity of their range of movement and having outwardly facingshoulders and plates attached to the aforesaid flanges and straddlingthe said bars and arranged to cooperate with the said shoulders informing stops for limiting outward movement of the bars.

52. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which has an internal downwardly and outwardly slopingsurface which in the upper position oi the said chillsection forms thesurrounding wall of the lower end of the chamber and in the lowerposition of the said chill-section is arranged below the chamber, saidchill also comprising a suitably supported annular upper section whichforms the surrounding wall of the chamber between the lowerchill-section and the cops movable members spaced circumferentially ofthe mold and extending under th lower chill-section and locking thelatter in its upper position, or removed from under the last-mentionedchill-section, according as they are at the one or the other extremityof their range of movement.

53. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber and isdiametrically enlarged at its lower end; a chill surrounding the chamberand comprising an annular vertically shiftable lower section which hasan internal downwardly and outwardly sloping annular surface which inthe upper position of the said chill-section forms the surrounding wallof the aforesaid diametrically enlarged end of the chamber, said chillalso comprising a suitably supported annular upper section forming thesurrounding wall of the chamber between the lower chill-section and thecope and being smaller in internal diameter than the last-mentionedchill-section between the upper end and the diametrically enlarged lowerend of the chamber; means for locking the lower chill-section in itsupper position, said locking means being adapted to be renderedinoperative to permit the last-mentioned chill-section to lower andmaintain its aforesaid beveled surface in contact with the castingduring the horizontal contrac tion of the casting formed in and by themold, and the drag comprising an annular metal casing arranged under andconcentrically relative to the diametrically enlarged lower end of theaforesaid chamber.

5a. A mold of the character indicated co mprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber and isdiametrically enlarged at its lower end; a chill surrounding the chamberand comprising an annular vertically shiftable lower section which hasan internal downwardly and outwardly sloping annular urface which in theupper position of the said chill-section forms the surrounding wall ofthe aforesaid diametrically en larged end of the chamber, said chillalso comprising a suitably supported annular up per section forming thesurrounding wall of the chamber between the lower chill-section and thecope and being smaller in internal diameter than the last-mentionedchill-section between its upper end and the diametrically enlarged lowerend of the chamber; means for locking the lower chill-section in itsupper position, said locking means being adapted to be renderedinoperative to permit the lower chill-section to lower and maintain itsaforesaid beveled surface in contact with the casting during thehorizontal contraction of the casting formed in and by the mold, and thedrag comprising an annular metal casing which is arranged under andconcentrically relative to the diametrical enlargement of the lower endof the aforesaid chamber and has its upper edge covered by a layer ofpacked sand which forms the bottom of the said enlargement of thechamber.

55. A mold of the character indicated comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber and isdiametrically enlarged at its lower end; a chill surrounding the chamberand comprising an annular vertically shiftable lower section which hasan internal downwardly and outwardly sloping and the cope and beingsmaller in internal 2 diameter than the last-mentionedchill-sectionbetween its upper end and the diamctrically enlarged lower end of thechamber; means for locking the lower chill-section in its upperposition, said locking means being adapted to be rendered inoperative topermit the last-mentioned chill-section to lower and maintain itsaforesaid beveled surface in contact with the casting during the horizontal contraction of the casting formed in and by the mold, and the dragcomprising an annular metal casing arranged under and concentricallyrelative to the diametrically enlarged lower end of the aforesaidchamber, which casing is provided in its upper edge with a recess havingundercut side walls and extending circumferentially of the casing, saidedge being covered by a layer of packed sand, which layer extends intoand occupies the said recess.

56. A mold of the character indicated. comprising a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber be tween the drag and the cope, which chamber hasan inlet for the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which is provided with an internal downwardly andoutwardly sloping surface which in the upper position of the saidchill-section forms the surrounding wall of the lower end of thechamber, said chill also comprising a suitably supported annular uppersection which forms the surrounding wall of the chamber between i thelower chil -section and the cope; means for locking the lowerchill-section in its upper position, said locking means being adapted tobe rendered inoperative to thereby permit the last-mentionedchill-section to lower; suitably supported shittable bars normallyarranged to move into the aforesaid chamber, means for actuating thesaid bars inwardly, and such a connection between the said bar-actuatingmeans and the lower chill- 7 section that the latter can only lowerduring the inward movement of the bars by the baractuating means.

57.'ln a mold or" the character indicated compi mg a lower mold-part ordrag; an upper mold-part or cope arranged a suitable distance above thedrag to form a chamber between the drag and the cope, which cham ber hasan inlet to" the passage of molten metal to the chamber; a chillsurrounding the chamber and comprising an annular vertically shiftablelower section which is provided with an internally downwardly andoutwardly sloping surface which in the upper positiono'i the saidchill-section forms the surrounding wall of the lower end of thechamber, said chill also com rising a suitably supported annular uppersection which forms the surrounding wall or the chamber between thelower chill-section and the cope means "for locking the lowerchill-section in its upper position, said locking means being adapted tobe rendered inoperative to thereby permit the last-mentionedchill-section to lower suitably supported endwise movable bars placedsubstantially radially and spaced circumferentially of the upper portionof the chill and being normally in their outer position and in the saidposition being arranged to move into the aforesaid chamber; meanswhereby the said bars are locked in their outer position, saidbar-locking means being shi'ftable to free the bars and thereby permitthe inward movement of the bars; means whereby the said bars when thebars are rendered free to move inwardly are actuated inwardly, and such.a connection between the said bar actuating means and the lowerchill-section that the latter can only lower during the inward movementof the said bars by the baractuating means.

In testimony whereof, I sign the foregoing specification, in thepresence of two witnesses.

Tl-lOliiAS D. NEST.

Witnesses:

C. H. Donna, B. C. BROWN.

